Gas meter



y 15, 1930- I H. ROSENTHAL 1,770,432

' GAS Ina-R Filed Juno29. 1926 Daren/12r- Fig. 2..

Elana Rosenthal.

Q Patented July 15, 1930 umre srA'rEs. PATENT on HANS ROSENTHAL, OF

BERLIN, GERMANY, ASSIGNOR TO JULIUS PINTSCH AKTIEN- GESELLSGHAFT, OF BERLIN, GERMANY en's METER Application filed June 29, 1926, Serial No.'119,389, and. in Germany July 1, 1925.

This invention relates to dry gas meters of the type furnished with one single membrane, in which the movement of the membrane is reversed in the end positions by the sudden reversal of inlet and outlet valves.

In the case of such gas meters the necessity for a movement of the membrane which is as even and regular as possible has repeatedly been emphasized, i. e., the resistance which the membrane upon its operation is required to overcome should remain as far as possible the same, in order to prevent fluctuations in the pressure of the gas.

Beyond the provision of a crossed spring this object has never inany way been even approximately attained, and even in the case of this known arrangement the second important condition, viz., that the loss of pressure in the meter should be as little as possible, is not entirely fulfilled, since the coil spring is not only tensioned, but dueto its tension varies its position, and is continuous ly required to overcome a by no means inconsiderable friction against a surface which is disposed vertically to the direction of movement, this representing a loss in pressure.

The present nates this loss of pressure by friction, i. e., limits the same to the short interval directly prior to the reversal. Y 7

In the drawings, Fig. l is a vertical section, partly in elevation, of an embodiment of the invention; while Fig. 2 shows a detail section, plan and side view of one of the valveoperating levers.

1 is the membrane, the rod 2 of which moves in either direction in two 3 and 8 which are mounted Within the easing of the gas meter. The movement of the membrane is transmitted by means of cords 4, 49, running over rolls 5, 5 to .the cord plates 6, 6 which each possess an abutment or extension member in the form of a lever 7 or 7 Between the two levers 7 and 7 is provided the valve control rod 8, furnished with.

driving members 9, 9 which through the medium of the control levers 10, 1O. engage with the inlet and outlet valves (not shown). The construction of these levers 10, 10 is shown clearly in Fig. 2. It will be seen that the gas valves.

10, 10 are pressed by means of I coil invention completely elimi-- sheet metal guides these levers are preferably provided at one end thereof with an eye, the lever arm eXtendmg perpendicular to the plane of Fig. 1. At the other end of the lever arm is mounted a rod 10 which carries the valve member in the usual manner. By displacement of the rod 8, the lever 10 is moved, and the valve rod 10 is moved in the direction indicated by the arrow P (Fig. 2), thus opening and closing In the normal position the control levers a coil spring 11 against the guides 3 and 3 Automatic release of the driving members 9, 9 is allowed by provision of the stops 12, 12 The operation is as follows: M

It is assumed that the membrane moves in the direction indicated by the arrow. This movement causes the cord' l, secured to the plate 6 and the rod 2, to pull on the plate 6, so that the latter rotates and rotates the valve control lever 7 in a clockwise direction. As the rotation of the plate 6 continues the lever arm 7' is increased to the extent necessary for overcoming the counter-pressure which gradually increases by the compression of the spring 11. By the movement of the valve control lever 8, the valve lever 10, by means of the driving member 9 located on the former, is also operated, so that the valves open, viz., for such length of time until the driving member 9 is released by the stop 12 presses the control lever 10 into the position shown. When the membrane moves towards the left the above operation'is repeated in the reversed manner.

What I claim as new "and desire to secure by Letters Patent is: i V

' 1. In a dry gas meter of the single membrane type,the combination of a membrane, a rotatablem'ember, means connecting said membrane with said rotatable member whereby the rotatable member is rotated upon movement'of the membrane in one direction, a lever carried by said rotatable member, a longitudinally movable member engageable and actuatable by said lever, a valve operating member, and spring means connected 'with said longitudinally movable member when the sprlng 11 accordingly u at and detachably connect-ed with said valve operating member.

2. In a dry gas meter of the single membrane type, the combination of a membrane, a rod connected to and movable by said membrane, a rotatable segmental member, means connecting said segmental member with said movable rod to rotate the said segmental member upon movement of the rod, a lever carried by said segmental member, a second rod engageable and movable by said lever, a valve operating member, spring means connected with said second rod and with said valve operating member and serving to actuate said valve operating member on movement of said second rod and means for disconnecting said spring means from said valve operating member when said second rod has moved a predetermined distance.

3. In a dry gas meter of the single membrane type, the combination of a membrane, a rotatable segmental member, means connecting said membrane with said segmental member whereby the segmental member is rotated upon movement of the membrane in one direction, a lever carried by said segmental member, a longitudinally movable member engageable and actuatable by said lever, a valve operating member, and spring means connected with said longitudinally movable member and detachably connected with said valve operating member, and means for automatically disconnecting said spring means from said valve operating member.

4. In a dry gas meter or the single membrane type, the combination of a membrane, a longitudinally movable rod connected thereto, a pair of rotatable members, means connecting said rotatable members to said rod, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at "each end by one of said levers and to be moved thereby, valve operating members, and spring means con nected with said second mentioned rod and detachably connected with said valve operating members.

5. In a dry gas meter of the single membrane type, the combination of a membrane, a pair of guide members, a rod connected to said membrane and longitudinally movable in said guides, a pair of rotatable members, means connecting said rotatable members to said rod, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, valve operating members, and spring means connected with said second mentioned rod and detachably connected with said valve operating members.

6. In a dry gas meter of the single membrane type, the combination of a membrane, a longitudinally movable rod connected thereto, a pair of rotatable members, means connecting said rotatable members to said rod, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, valve operating members, spring means connected With said second mentioned rod and detachably connected with said valve operating members, and means for automatically disconnecting said spring means from said valve operating members.

7. In a dry gas meter of the single mem brane type, the combination of a membrane, a pair or guide members, a rod connected to said membrane and lon itudinally movable in said guides, a pair of rotatable members, means connecting said rotatable members to said rod, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, valve operating members, spring means connected with said second mentioned rod and detachably connected with said valve operating members, and means for automatically disconnecting said spring means from said valve operating members.

8. In a dry gas meter of the single membrane type, the combination or" a membrane, a longitudinally movable rod connected thereto, a pair of rotatable members, means connecting said rotatable members to said rod, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, a pair of valve operating members, a pair of blade springs each connected with said second mentioned rod and each detachably connected with one of said valve operating members, and means for automatically disconnecting said springs from said valve operating members.

9. In a dry gas meter of the single membrane type, the combination of a membrane, a longitudinally movable rod connected thereto, a pair of rotatable segmental members, means connecting said rotatable segmental members to said rod, levers carried by said segmental members, second longitudinally movable rod adapted to be engaged at each end by one or said levers and to be moved thereby, valve operating members, spring means connected with said second mentioned rod and detachably connected with said valve operating members, and means for automatically disconnecting said spring means from said valve operating members.

10. In a dry gas meter of the single mem brane type, the combination of a membrane, a pair of guide members, rod connected to said membrane and longitudinally movable in said guides, a pair of rotatable segmental members, means connecting said rotatable segmental members to said rod, levers carbers, spring means connected with said second mentioned rod and detachably connected with said valve operating members.

11. In a dry gas meter of the single membrane type, the combination of a membrane,

a longitudinally movable rod connected thereto, a pair of rotatable members, a pair of rollers, a pair of cords passing over said rollers and connected at one end to the said rod and at the other end to one of said rotatable members, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, valve operating members, spring means connected with said second mentioned rod and detachably connected with said valve operating members.

12. In a dry gas meter of the single membrane type, the combination of a membrane, a longitudinally movable rod connected thereto, a pair of rotatable members, a pair of rollers, a pair of cords passing over said rollers and connected at one end to the said rod and at the other end to one of said rotatable members, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, valve operating members, spring means connected with said second mentioned rod and detachably connected with said valve operating members, and means for automatically disconnecting said spring means from said valve operating members.

13. In a dry gas meter of the single membrane type, the combination of a membrane, a longitudinally movable rod connected thereto, a pair of rotatable members, a pair of rollers, a pair of cords passing over said rollers and connected at one end to the said rod and at the other end to one of said rotatable members, levers carried by said rotatable members, a second longitudinally movable rod adapted to be engaged at each end by one of said levers and to be moved thereby, valve operating members, spring means connected with said second mentioned rod and detachably connected with said valve operating members, and stop members for automatically disconnecting said spring members for said valve operating members.

In testimony whereof I have afiixed my signature.

HANS ROSENTHAL. 

